[stratum-dev] Table entry from stratum_bmv2 different from ONOS store

Maximilian Pudelko max at opennetworking.org
Tue May 18 18:20:16 UTC 2021

Hi Syd,

I think this could be related to the recent PI update we did for
Stratum-bmv2: https://github.com/stratum/stratum/pull/660
It now returns canonical byte strings in all P4Runtime messages, which
confuses ONOS. We're working on fixing it:


On Tue, May 18, 2021 at 7:59 AM A Sydney via stratum-dev <
stratum-dev at lists.stratumproject.org> wrote:

> Hi Stratum folks,
>                           I've used the debugger in Intellij to narrow
> down the issue (@P4RuntimeFlowRuleProgrammable.java line 233). As shown in
> the attached debugger gui, It appears that
> "tableAction->runtimeParams->value->value->value->hb" has different values
> for "translatedEntitity.get().translated()" and "entry". Hence, these flow
> rules are in a "PENDING ADD" state. Can you kindly provide feedback on this
> issue? Is this stratum specific, ONOS, or perhaps java?
> Thanks,
> -Syd
> [image: onos_debug_gui.png]
> On Wed, May 12, 2021 at 11:06 PM A Sydney <asydney007 at gmail.com> wrote:
>> Hi Stratum folks,
>> # Context: I'm running standalone stratum_bmv2 instances on Debian 10
>> connected to ONOS where I've got a custom pipeconfig and app.
>> # Problem:
>> When I install flows, ONOS logs an error that table entries in
>> "l2_exact_table" on the switch are different from what's recorded in the
>> ONOS store. However, if you take a look at the rules, they are identical as
>> shown here: https://pastebin.com/i4Jkt26i
>> I activated the debugger and set a breakpoint near "if
>> (!translatedEntity.get().translated().equals(entry))" (i.e. in
>> P4RuntimeFlowRuleProgrammable.java) and both "translated" and "entry" have
>> the same values.
>> Have you come across this one? If not, perhaps I should take this up with
>> ONOS folks?
>> PS. I don't see this issue for other tables.
>> Thanks,
>> -Syd
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